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kkurt [141]
3 years ago
14

Completely Factor: a 2 - a - 20

Mathematics
1 answer:
Rus_ich [418]3 years ago
7 0
a^2 - a - 20=\\
a^2-5a+4a-20=\\
a(a-5)+4(a-5)=\\
(a+4)(a-5)
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